TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 341 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP A

I

NOTE

In the following step, if B.O. light is out, place red lead

of multimeters on switch terminal (1). If white light is out,

place red lead of multimeters on switch terminal (2).

1. Reconnect lead 38 to dome light.

2. Remove cover from dome light (para 8-27).

3. Place red lead of multimeters on output

terminal (1 or 2) of dome light switch and

black lead to ground.

4. Turn MASTER and dome light switches ON

and check for voltage.

5. Turn dome light and MASTER switches

OFF.

Is voltage present?

1. Remove lamp from lamp assembly.

2. Place red lead of multimeters on contact in

center of socket and black lead to ground.

3. Turn MASTER and dome light switches ON

and check for voltage.

4. Turn dome light and MASTER switches

OFF.

Is voltage present?

Replace lamp (para 8-27).

I

Replace lamp assembly (para 8-27).

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